【摘要】 本文根据Von Misses屈服准则及Prandtl-Reuss增量关系推导出了理想弹塑性材料、薄壁钢管杆件单元的弹性及弹塑性增量本构关系。采用根据上述本构关系和有限分割有限元法编制的程序,本文首先对国外近来发表的一些实验结果及理论计算结果进行了分析比较,其次对一个具有42个杆件的穹顶网壳进行了非线性全过程分析。更多还原

【Abstract】 In this paper the incremental stress strain relationship is presented for thin walled circular steel tube element of elastic plastic material. Based upon that a non linear analysis program has been compiled with the finite segment and finite element method. Some numerical examples with experimental results taken from recent publications are analyzed and compared. The complete process of a dome with 42 elements is thoroughly studied and compared with the results of an elastic large-displament analysis.更多还原